This article describes the extent to which hospitals use different integrative processes to assimilate physicians and assesses the extent to which their use is associated with managed care penetration and hospital characteristics. Results from a national survey of 1,495 community hospitals indicate that these integrative processes are quite prevalent. The use of integrative processes tends to be more prevalent in hospitals that are large, urban, involved in teaching, and members of hospitals systems. Use of particular integrative processes also appears to be associated with different thresholds of managed care penetration.